GIA Diamond Grading Scales: Universal Quality Measure - GIA 4Cs
The prospect of purchasing a diamond may seem daunting, but through GIA, an unbiased authority on diamonds, you have several handy resources to help you select the highest quality diamond. First up, an overview of the 4Cs: Color, Clarity, Cut, and Carat Weight.
GIA Diamond Grading
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments.
Diamonds & Diamond Grading
The Diamond and Diamond Grading eLearning course brings to life the skills needed to grade the color, clarity and cut of diamonds through video, graphics, images and text. Key topics include: The influence of color, clarity, cut and carat on diamond value; Determining proportions and estimating weight; Diamond treatments, simulants, and ...
Diamond Quality Factors
The GIA D-to-Z scale is the industry standard for color-grading diamonds. Each letter represents a range of color based on a diamond’s tone and saturation. Many diamonds emit a visible light called fluorescence when they’re exposed to ultraviolet (UV) radiation.
GIA Diamond Grading & Reports | GIA 4Cs
Diamond Color Grading. Viewed in a standardized environment, every diamond’s color is graded against masterstones . Multiple GIA graders independently evaluate each diamond and use our proprietary grading technology.
How GIA Grades Diamonds
GIA provides a cut quality grade only for standard round brilliant diamonds that fall in the GIA D-to-Z color range. After the color and clarity grading process, the diamond’s proportions (measurements and facet angles), along with polish and symmetry descriptions, are used to determine its GIA Cut Grade.
Understanding the 4Cs of Diamond Quality | Diamond Factors - GIA 4Cs
The 4Cs and GIA International Diamond Grading System ™ established scientific methods for diamond grading, creating a universal language for communication, and most importantly, ensuring diamond customers know exactly what they are purchasing.
Colored Diamonds: Diamond Grading & Reports | GIA 4Cs
The GIA Diamond Grading Report. This report uses the universally accepted GIA standards to determine a natural diamond’s shape, color, clarity, cut and carat weight – as well as proportions, finish and treatments.
GIA’S 4CS GUIDE TO UNDERSTANDING DIAMOND QUALITY - GIA 4Cs
As creator of the 4Cs and the International Diamond Grading System,™ GIA is the global authority and trusted source for unbiased diamond quality assessment. This guide is devoted to helping you choose both well and wisely when shopping for a diamond.
Analysis & Grading - GIA.edu
GIA is the world’s most trusted name in diamond grading and gem identification. With objectivity and expertise as its hallmarks, GIA ensures the integrity and accuracy of every report it issues. GIA tests every material submitted to determine whether it is natural or not, and discloses any treatments discovered during our examination.
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